JP2000272393A - Seat flattening structure for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seat flattening structure for a vehicle enhancing reclining performance of a front seat. SOLUTION: A first reversed condition where a reverse side 10a of a seat cushion 10 is flat as well as a second reversed condition where the reverse side 10a of the seat cushion 10 is tilted forwardly can be attained, by means of adjacent operation lever 13 and a latch plate 14. A reclining angle of a seat back 4 of a front seat 1 is increased and reclining performance for the front seat 1 is enhanced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat seat structure for an automobile.

[0002]

2. Description of the Related Art Generally, a flat structure in which a seat cushion and a seat back can be horizontally arranged at substantially the same height is known for a seat for an automobile in order to take a rest or sleep, or to widely use a luggage room. (Refer to Japanese Utility Model Publication No. 7-27239 as a similar technique).

[0003] This kind of flat structure is provided with a seat cushion and a seat back which are rotated to be horizontally inverted, and the back surface of the seat cushion and the back surface of the seat back are substantially the same height when the seat cushion is inverted. In particular, in the case of the seat cushion, the whole is pivoted forward about a front end fulcrum set at the front end of the seat cushion, so that a horizontal inverted state can be obtained.

[0004]

However, in such a conventional technique, since the inverted seat cushion is in a horizontal state at the same height as the seat cushion, the front seat back is moved backward. When the vehicle is reclined, the front seat back hits the horizontally inverted seat cushion, and a large reclining angle cannot be secured rearward, and the reclining performance of the front seat deteriorates.

The present invention has been made by paying attention to such a conventional technique, and provides a flattened seat structure of an automobile capable of improving reclining performance of a front seat.

[0006]

According to the first aspect of the present invention,
The seat rail and the seat back are provided so that each can freely move back and forth by the slide rail, and each of the seat cushions is rotated to be in a horizontally inverted state, and the back surface of the seat cushion and the back surface of the seat back are substantially the same height when the seat rail is inverted. The seat cushion is a flattened seat structure of an automobile which is turned from the normal use state to the front side around the front end fulcrum to be in a reversed state, and the back side of the seat cushion is horizontal at or around the seat cushion. A lock mechanism capable of maintaining the first inverted state and the second inverted state in which the back surface of the seat cushion is lowered forward is provided.

According to the first aspect of the present invention, not only the first inverted state in which the back surface of the seat cushion is horizontal but also the second mechanism in which the back surface of the seat cushion is lowered forward by the lock mechanism provided on or around the seat cushion. Since the inverted state can also be obtained, the reclining angle of the front seat back is increased, and the reclining performance of the front seat is improved.

According to a second aspect of the present invention, there is provided the flattened seat structure for an automobile according to the first aspect, wherein a bracket is erected near a front end of the slide rail, and the front end fulcrum of the seat cushion is mounted on the bracket. Is provided.

According to the second aspect of the present invention, since the front end fulcrum of the seat cushion is provided on the bracket erected near the front end of the slide rail, a process for pivotally supporting the front end fulcrum of the seat cushion on the slide rail is provided. Since it is not necessary to perform the application, the manufacture of the slide rail is facilitated, and the rigidity of the slide rail can be prevented from being reduced.

According to a third aspect of the present invention, there is provided the flattened seat structure according to the second aspect, wherein the lock mechanism is fixed to a side surface of the bracket and has a first engagement portion and a second engagement portion at a lower end. A latch plate having a mating portion; and an operating lever rotatably mounted on a side surface of the seat cushion and having a distal end engaged with a first engaging portion and a second engaging portion of the latch plate. When the tip of the operating lever is engaged with the first engagement portion, the seat cushion is in the first inverted state, and the tip of the operation lever is in the second inverted state.
When the seat cushion is engaged with the engaging portion,
The state is reversed.

According to the third aspect of the present invention, the lock mechanism includes a latch plate fixed to a side surface of the bracket,
Since it is composed of the operation lever rotatably attached to the side surface of the seat cushion, it is easy to switch between the first inverted state and the second inverted state.

According to a fourth aspect of the present invention, there is provided the flattened seat structure for an automobile according to the second or third aspect, wherein a roller protruding outward in the vehicle width direction is provided at a lower end of the seat back. The roller is engaged with a slide rail fixed to the floor so as to be slidable back and forth, and a lock mechanism that engages with the roller to maintain at least a normal use state of the seat back is provided. The upper intermediate fulcrum and the middle part of the slide rail or the bracket are connected by a back link, the lock mechanism is released, and the roller of the seat back slides rearward, so that the seat back rotates forward. It will be in a horizontal inverted state.

According to the fourth aspect of the present invention, the seat back is supported by the roller provided at the lower end of the seat back and the back link pivotally supported at the intermediate fulcrum of the seat back. It can be flipped in place without significant changes in position.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below with reference to the drawings. In this embodiment, a second-row second seat 1 as a "front seat" in a wagon car is provided.
3 shows a flattened structure according to a third row of third seats 2 as "rear seats" provided at the rear of the vehicle. The second seat 1 has a seat cushion 3 and a seat back 4.
The seat back 4 can be reclined rearward around the hinge point 5.

The third seat 2 is supported by a slide rail 6. The slide rail 6 is fixed to a floor 8 by front and rear legs 7. A pair of slide rails 6 are provided on the left and right sides, each having a cross-sectional C shape having an opening on the inner surface along the longitudinal direction. A luggage room R is formed behind the slide rail 6.

In the vicinity of the front end of the slide rail 6,
A bracket 9 as a “peripheral member” is erected on the floor 8. The bracket 9 has a rectangular shape in a side view, and is joined to the inside of the slide rail 6 (FIG. 8).
reference). The joining rigidity of the slide rail 6 is improved by joining the bracket 9.

The third seat 2 includes a seat cushion 10
And the seat back 11. The front end of the seat cushion 10 is pivotally supported by a front end fulcrum 12 set at the upper front end of the bracket 9. The rear end of the seat cushion 10 is placed on a support (not shown) so that the normal use state with the surface facing upward can be reliably maintained. In addition, the seat cushion 10
By lifting the rear end of the seat cushion 10 and rotating the entire seat cushion 10 to the front side around the front end fulcrum 12, an inverted state with the back surface 10a facing upward can be obtained. As the reversing structure of the seat cushion 10, since it is simply rotated to the front side about the front end fulcrum 12, the structure is simple and the reversing operation is easy.

There are two types of inverted states of the seat cushion 10, a "first inverted state" in which the back surface 10a of the seat cushion 10 is horizontal, and a "second inverted state" in which the back surface 10a is lowered forward by a predetermined angle θ. There is. The selection between the first inverted state and the second inverted state is performed by the operation lever 13 and the latch plate 14 as a “lock mechanism”. The operation lever 13 is rotatably attached to a side surface of the seat cushion 10 and a spring 1 for urging the front end 13a to the back side.
5 are provided. The latch plate 14 is welded to the inner surface of the bracket 9, and the lower edge has a first engaging portion 14 a and a second engaging portion 14 b which are inclined like a saw blade.
Are notched. This latch plate 14
Extends upward to the region of the front end fulcrum 12, and also functions as a reinforcing plate for increasing the rigidity of the front end fulcrum 12.

Therefore, when the front end 13a of the operation lever 13 is engaged with the first engagement portion 14a of the latch plate 14 by rotating the seat cushion 10 to the front side, the back surface 10a of the seat cushion 10 is horizontal. In the first inverted state (FIG. 3), when the distal end 13a of the operation lever 13 is engaged with the second engagement portion 14b, the second inverted state (FIG. 4) in which the back surface 10a is lowered forward by a predetermined angle θ. . Since the first engagement portion 14a and the second engagement portion 14b are each in an inclined state, if the seat cushion 10 is slightly lifted in a state where the tip 13a of the operation lever 13 is engaged with the second engagement portion 14b, The distal end 13a is disengaged from the second engaging portion 14b and automatically engages with the first engaging portion 14a.
If 0 is lifted, it can be disengaged from the first engagement portion 14a and returned to the original normal use state.

On the other hand, a roller 16 is provided at the lower end of the seat back 11 so as to protrude outward in the vehicle width direction. The roller 16 is engaged with the slide rail 6 so as to be slidable back and forth. An intermediate fulcrum 17 is set at an intermediate portion of the seat back 11, and the intermediate fulcrum 17 and the bracket 9 are connected by a back link 18. Since the end of the back link 18 is pivotally supported by a bracket 9 that is different from the slide rail 6, there is no need to perform processing for pivotally supporting the slide rail 6 and the slide rail 6 can be manufactured. It becomes easy and the rigidity of the slide rail 6 can be prevented from lowering.

At the rear of the bracket 9, a lock plate 20 as a "lock mechanism" rotatable around a front end shaft 19 is mounted. This lock plate 20
It has a substantially L shape having a portion extending rearward from the front end shaft 19 and a portion extending downward. Further, between the lock plate 20 and the bracket 9, a lock plate 2 is provided.
There is provided a spring 21 for urging the rotation of 0 downward.
The portion extending rearward of the lock plate 20 extends rearward from the rear end of the bracket 9, and a first engagement portion 20 a and a second engagement portion 20 b are respectively recessed at the lower end of the portion. A roller 16 provided at the lower end of the seat back 11 can be engaged with the inside of the first engagement portion 20a and the second engagement portion 20b. These first
Since the engaging portion 20a and the second engaging portion 20b are respectively recessed diagonally rearward, the engaged rollers 16
Is restricted, but the rearward movement along the lower edge of the roller 16 is possible. A lock release wire 22 is provided at the lower end of the lock plate 20. By pulling this wire 22, the lock plate 20 is rotated upward, and the first engagement portion 20 of the roller 16 is rotated.
a to the second engagement portion 20b.

The roller 16 of the seat back 11
Is engaged with the first engagement portion 20a, the seat back 11 is in a normal use state in which the seat back 11 stands up at a predetermined angle,
In a state where the seat back 11 is engaged with the second engagement portion 20b, the seat back 11 is in a reclining state in which the seat back 11 is greatly inclined rearward.
The formation of the first engagement portion 20a in the lock plate 20 is the same as in the related art.
0, the second engagement portion 20 for obtaining the reclining state.
There has been no example of forming b together.

From the reclining state, the seat back 11
Occurs, the roller 16 is disengaged from the second engagement portion 20b and automatically engages with the first engagement portion 20a, so that a normal use state is established. If the seat back 11 is further raised in a state where the seat cushion 10 has been inverted in advance as described above, the roller 16 is disengaged from the lock plate 20, and
The seat back 11 can be largely turned forward. When the seat back 11 is largely rotated forward, the roller 16 moves to the rearmost position along the slide rail 6, and the seat back 11 is in an inverted state in which the back surface 11a is horizontal at that position. The seat back 11 is in an inverted state,
Its front end (top end) rests on a support (not shown)
The inverted state is maintained.

Next, the third seat 2 according to this embodiment
Will be described in order.

Normal use state (FIG. 1): seat back 11
When the lower roller 16 is engaged with the first engagement portion 20a of the lock plate 20, the seat back 11 is in a normal use state in which the seat back 11 stands up at a predetermined angle. The occupant can sit on the third seat 2 in a normal posture with the seat cushion 10 in a normal use state with the surface facing upward.

Reclining state (FIG. 2): By pulling the wire 22 for unlocking, rotating the lock plate 20 upward and engaging the roller 16 of the seat back 11 with the second engagement portion 20b, The seat back 11 can be in a reclining state in which the seat back 11 is largely inclined rearward. As described above, since the reclining state of the seat back 11 can be obtained by forming the second engagement portion 20b on the existing lock plate 20, a dedicated reclining mechanism is not required, and the support structure of the seat back 11 is simplified. it can.

First reversal state (FIG. 3): When the seat back 11 is lifted upward from the reclining state (or a normal use state), the roller 16 is moved from the second engagement portion 20b (and the first engagement portion 20a). Because it comes off, seat back 11
Can be turned to the front side as it is to bring it into a horizontal inverted state. Further, if the seat cushion 10 is also rotated to the front side and the tip 13a of the operation lever 13 is engaged with the first engagement portion 14a of the latch plate 14, the seat cushion 10 is in the horizontal first inverted state. . By doing so, the back surface 11a of the seat back 11 and the back surface 10a of the seat cushion 10 are substantially at the same height, and the occupant lies straight on the third seat 2 more than in the reclining state. Can be. Further, when the occupant does not sleep, the luggage room R is in an expanded state, so that more luggage can be loaded.

Second reversal state (FIG. 4): When the operating lever 13 is lifted and its tip 13a is engaged with the second engaging portion 14b, the back surface 10a of the seat cushion 10 is lowered forward by a predetermined angle θ. The state becomes the second inversion state. The reclining angle of the seat back 4 of the second seat 1, which is the front seat, is increased by the amount that the seat cushion 10 is in the second inverted state, and the reclining performance of the second seat 1 is improved. That is, as shown in FIG. 3, when the seat cushion 10 is in the horizontal first inverted state, even if the seat back 4 of the second seat 1 is tilted to the rear side, it immediately hits the seat cushion 10 and the seat back 4 is sufficiently Although the seat cushion 10 cannot be reclined to the rear side, the seat back 4 reclines more rearward by setting the seat cushion 10 in the second reversing state of the front down as described above.

[0029]

According to the first aspect of the present invention, not only the first inverted state in which the back surface of the seat cushion is horizontal but also the lock mechanism provided on or around the seat cushion,
Since the second inverted state in which the back surface of the seat cushion is lowered forward can also be obtained, the reclining angle of the front seat back increases, and the reclining performance of the front seat improves.

According to the second aspect of the present invention, since the front end fulcrum of the seat cushion is provided on the bracket erected near the front end of the slide rail, a process for pivotally supporting the front end fulcrum of the seat cushion on the slide rail is provided. Since it is not necessary to perform the application, the manufacture of the slide rail is facilitated, and the rigidity of the slide rail can be prevented from being reduced.

According to the third aspect of the present invention, the lock mechanism comprises: a latch plate fixed to the side surface of the bracket;
Since it is composed of the operation lever rotatably attached to the side surface of the seat cushion, it is easy to switch between the first inverted state and the second inverted state.

According to the fourth aspect of the present invention, the seat back is supported by the roller provided at the lower end of the seat back and the back link pivotally supported at the intermediate fulcrum of the seat back. It can be flipped in place without significant changes in position.

[Brief description of the drawings]

FIG. 1 is a side view showing a normal use state of a third seat according to an embodiment of the present invention.

FIG. 2 is a side view showing a reclining state.

FIG. 3 is a side view showing a first inverted state.

FIG. 4 is a side view showing a second inverted state.

FIG. 5 is a side view showing a lock plate.

FIG. 6 is a perspective view showing a latch plate.

FIG. 7 is a sectional view taken along the line SA-SA shown in FIG.

FIG. 8 is a sectional view taken along the line SB-SB shown in FIG.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 second seat (front seat) 2 third seat (rear seat) 4 front seat back 6 slide rail 9 bracket (peripheral member) 10 seat cushion 10 a back 11 seat back 11 a back 12 front end fulcrum 13 operating lever (lock mechanism) 13 a Tip 14 Latch plate (lock mechanism) 14a First engagement portion 14b Second engagement portion 16 Roller 17 Intermediate fulcrum 18 Back link 19 Front end shaft 20 Lock plate (lock mechanism) R Luggage room

Claims (4)

[Claims] 1. A seat cushion and a seat back, each of which can be freely moved back and forth by a slide rail, and each of which rotates and turns horizontally, and a back surface of the seat cushion and a back surface of the seat back are substantially at the time of turning over. At the same height, the seat cushion is a flattened seat structure of an automobile that is turned from the normal use state to the front side about the front end fulcrum, and the seat cushion or the periphery thereof, A flat seat structure for an automobile, comprising a lock mechanism capable of maintaining a first inverted state in which the back surface of the cushion is horizontal and a second inverted state in which the back surface of the seat cushion is lowered forward. 2. The flattened seat structure for an automobile according to claim 1, wherein a bracket is erected near a front end of the slide rail, and the bracket is provided with a fulcrum of a front end of the seat cushion. Features flat seat structure for automobiles. 3. The latch plate according to claim 2, wherein the locking mechanism is fixed to a side surface of the bracket and has a first engagement portion and a second engagement portion at a lower end. And an operating lever rotatably attached to a side surface of the seat cushion and having a distal end engaged with a first engaging portion and a second engaging portion of the latch plate, wherein the distal end of the operating lever is the first lever. When the seat cushion is engaged with the engaging portion, the seat cushion is in the first inverted state, and when the tip of the operation lever is engaged with the second engaging portion, the seat cushion is in the second inverted state. A flattened seat structure for an automobile. 4. The flattened seat structure for an automobile according to claim 2, wherein a roller protruding outward in a vehicle width direction is provided at a lower end of the seat back, and the roller is fixed to a floor. A lock mechanism that engages with the rollers so as to be slidable back and forth, and engages with the rollers to maintain at least the normal use state of the seat back, and an intermediate fulcrum above the rollers of the seat back, By connecting the middle part of the slide rail or the bracket with the back link, releasing the lock mechanism, and sliding the roller of the seat back to the rear, the seat back rotates to the front side to be in a horizontal inverted state. A flattened seat structure for an automobile.